Sanitary Sewer


Flushing anything besides toilet paper can result in blockages and expensive home plumbing problems. Please DO NOT flush paper towels, facial tissues, napkins, or “flushable” wipes.

Mercury & Chloride

Mercury Removal & Chloride Reduction Resources has enacted regulations to reduce the discharge of mercury and chlorides “at the source”, to prevent the harmful effects these pollutants have on the environment. Consequently, the Brookfield sewage treatment plant (where Sanitary District No. 4’s sewage is treated), is seeking voluntary mercury removal and chloride use reduction activities from all industrial, commercial and residential sources. We have brochures: “Water Softeners and The Environment” and “The Waukesha County Mercury Collection Program” available at the Town Hall. 


Mercury is an extremely toxic, non-degrading substance in the environment. As an environmental contaminant, mercury travels far and wide in air and water. Mercury poisoning has been linked to nervous system, kidney, and liver damage, and impaired childhood development. What can you do to reduce mercury in your wastewater? Remove mercury at the source by bringing your mercury to a hazardous waste or authorized mercury collection site. Mercury can be found in electrical switches, thermostats, fluorescent lights, thermometers, blood pressure gauges, chemical reagents and cleaners. Do not pour mercury down the drain and do not place it in the trash. Please call Waukesha County at (262) 896-8327, or go to for more information.


The DNR is requiring the Brookfield treatment plant to identify significant sources of chloride discharged to the sewer system. State regulation NR211.40 authorizes publicly owned sewage treatment works to regulate chloride discharges from all sources. Voluntary source reduction efforts will be sought from any significant dischargers. What do you do to reduce chloride in your wastewater? A major origin of chloride discharge is water softeners and water softening processes. Source reduction efforts include using the minimum salt dosage required during softener regeneration. This is easily accomplished with the use of a regeneration type softener.

Sewer Rates

View sewer rates HERE.

Sewer Ordinance

Chapter 23 – Sewer User Regulations